It’s a horrible situation. The mother probably feels she needs to find someone to blame.
It’s actually fairly common for loved ones of suicide victims to lash out and blame someone.I think her mother needs to be a bit kinder! Imagine blaming anyone at all for someone taking their own lives! If it’s grief that’s one thing,she needs to blame someone who else if not the police, paramedics, friends, herself?? Their is no blame to place, no one made her kill herself! A series of events that she started led to her killing herself! And I imagine all involved particularly the police officer she so wrongly addressed the blame to feels terrible enough and has replayed this over and over! End of the day her daughter committed an offence she admitted to, so mayb start by admitting that to herself before blaming anyone.